Command Resource
To avoid ambiguity throughout this page, Sim (initial cap) refers to the Sim API resource. SIM (all caps) refers to the physical Subscriber Identity Module (that is, a SIM card) associated with a Sim resource.
Commands enable you can exchange simple machine-to-machine (M2M) messages with devices over SMS. In order to use Commands, devices must be capable of receiving and sending SMS. The SIM does not require an addressable phone number to send or receive a Command. Commands have a maximum length of 160 single-byte characters.
Commands to SIM (Mobile Terminated)
SMS Commands sent to your device, also known as Mobile Terminated (MT) commands, are initiated by making a POST request to the Commands API endpoint. The Command will be sent to your SIM asynchronously. When the Command API is invoked to send an SMS Command to your device, a Command resource will be created with status queued. Learn more about the Command states in the Status section below.
The SMS received by your device will always be from 000. There is no publicly addressable phone number for your Super SIM. The only way to reach it via SMS is by using the Commands API.
Commands API will attempt to send a Command to your Super SIM-powered device for up to 24 hours. This is to account for cases where your device has not yet come online when your Command was sent. The Command resource will remain in queued status until the first attempt to send it and in sent status after the first attempt. The status will change to delivered once there is delivery confirmation. If there is no delivery confirmation within the 24 hour period, the status will stay as sent.
You can receive callbacks to a defined URL by providing a callback URL and callback method in your POST request. You will receive a HTTP request to that callback URL each time the status is updated.
https://supersim.twilio.com/v1/Commands
Commands from SIM (Mobile Originated)
All SMS sent from your device to 000 will be treated as Commands. The status for all Mobile Originated (MO) Commands will always be received.
Currently all SMS regardless of the number to which they were sent are treated as Commands, not just those sent to 000. This may change in the future. To ensure that there is no interruption to your services if this changes, all SMS you wish to be treated as Commands should be sent to 000.
You can be programmatically notified that an SMS Command has been received from your device (Mobile Originated) by configuring a webhook on your Super SIM’s Fleet resource.
Callbacks for status updates for MT Commands and Callbacks for received MO Commands are in private beta. Please reach out to Twilio support if you need them enabled for your account.
Asynchronous resource
The Command resource performs asynchronous operations. To receive an asynchronous notification when a Command resource has finished updating, provide a callback URL, and optionally a callback method parameter, when you create the Command.
Command properties
| Resource Properties in REST API format | |
|---|---|
sid
|
The unique string that we created to identify the Command resource. |
account_sid
|
The SID of the Account that created the Command resource. |
sim_sid
|
The SID of the SIM that this Command was sent to or from. |
command
|
The message body of the command sent to or from the SIM. For text mode messages, this can be up to 160 characters. |
status
|
The status of the Command. Can be: |
direction
|
The direction of the Command. Can be |
date_created
|
The date and time in GMT when the resource was created specified in ISO 8601 format. |
date_updated
|
The date and time in GMT when the resource was last updated specified in ISO 8601 format. |
url
|
The absolute URL of the Command resource. |
Command Resource Status Callbacks
The user can provide a callback method and callback URL to receive updates each time a Command to their device’s status changes.
AccountSid |
The SID of the Account that the Command resource belongs to. |
CommandSid |
The unique string that we created to identify the Command resource. |
SimSid |
The receiving Super SIM’s `SID` |
SimUniqueName |
The receiving Super SIM’s `UniqueName`. |
Command |
The body of the Command message. This value can be up to 160 characters of text. Binary mode is not supported |
Direction |
Indicates whether it is an MT/MO Command. It has two possible values - to_sim or from_sim. |
Status |
The delivery status of the Command. |
ErrorCode |
The error code (if any) associated with your Command. Unless the status is |
ErrorMessage |
Description of the error. Unless the status is failed, ErrorMessage will not be present. |
Status Values
When the API is called to send an SMS, the Command resource status will be set to the queued status. The status property will be updated to sent when an SMS is sent from Twilio Mobile Core to the visited cellular network to which your device is connected. If a delivery receipt (DLR) is received from your device, the status property will be updated to delivered. If at any point, this process fails and the Command is no longer deliverable, the status property will be updated to failed and an error code will be indicated on the resource.
queued |
The Command is queued in our network waiting to be sent |
sent |
The Command has been sent to the SIM |
delivered |
The Command has been delivered to the SIM and there was a delivery confirmation from the device |
received |
The Command has been received from the SIM |
failed |
The Command could not be sent |
Create a Command resource
https://supersim.twilio.com/v1/Commands
Parameters
| Parameters in REST API format | |
|---|---|
sim
Required
|
The |
command
Required
|
The message body of the command. |
callback_method
Optional
|
The HTTP method we should use to call |
callback_url
Optional
|
The URL we should call using the |
Example 1
Fetch a Command resource
https://supersim.twilio.com/v1/Commands/{Sid}
Parameters
| Parameters in REST API format | |
|---|---|
sid
Path
|
The SID of the Command resource to fetch. |
Example 1
Read multiple Command resources
https://supersim.twilio.com/v1/Commands
Parameters
| Parameters in REST API format | |
|---|---|
sim
Optional
|
The SID or unique name of the Sim that Command was sent to or from. |
status
Optional
|
The status of the Command. Can be: |
direction
Optional
|
The direction of the Command. Can be |
Example 1
To receive a Command (Mobile Originated) from a SIM, you should create or update an existing Fleet instance and provide a CommandsUrl property, and optionally a CommandsMethod property.
When a SIM sends an SMS message to the reserved phone number 000, a Command resource will be created and your Commands URL will be invoked. The Callback request will include the same parameters as the Commands Status Callbacks
Deleting Commands
You can delete a Command resource for a Mobile Terminatated Command once it has been sent or has failed. You cannot delete a Command resource while it is queued.
You can delete a Command resource for a Mobile Originated Command at any time.
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